openssl_pkey_get_private
Small error in this code:
$pub_key = openssl_pkey_get_public(file_get_contents('./cert.crt'));
$keyData = openssl_pkey_get_details($pub_key);
file_put_contents('./key.pub', $keyData['key']);
openssl_pkey_get_public
(PHP 4 >= 4.2.0, PHP 5)
openssl_pkey_get_public — Extract public key from certificate and prepare it for use
Description
openssl_get_publickey() extracts the public key from certificate and prepares it for use by other functions.
Parameters
- certificate
-
certificate can be one of the following:
- an X.509 certificate resource
- a string having the format file://path/to/file.pem. The named file must contain a PEM encoded certificate/private key (it may contain both).
- A PEM formatted private key.
Return Values
Returns a positive key resource identifier on success, or FALSE on error.
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User Contributed Notesopenssl_pkey_get_public
VaD
06-Jun-2008 07:36
06-Jun-2008 07:36
07-May-2007 09:40
you can get (and save to file) public key using openssl_pkey_get_details(resource $key ) function:
<?php
$pub_key = openssl_pkey_get_public(file_get_contents('./cert.crt'));
$keyData = openssl_pkey_get_details($pub_key);
fule_put_contents('./key.pub', $keyData['key']);
?>
dankybastard at hotmail
09-Feb-2005 05:52
09-Feb-2005 05:52
You must also use the string representation of the certificate to get the public key resource:
$dn = array(); // use defaults
$res_privkey = openssl_pkey_new();
$res_csr = openssl_csr_new($dn, $res_privkey);
$res_cert = openssl_csr_sign($res_csr, null, $res_privkey, $ndays);
openssl_x509_export($res_cert, $str_cert);
$res_pubkey = openssl_pkey_get_public($str_cert);
09-Aug-2004 08:44
This documentation notes it can take a PEM-formatted private key, but as per bug #25614, this is not possible in any form. The function simply returns a FALSE.
The only thing you can get public keys out of are X.509 certificates.
Furthermore, there is NO way to export a public key into a PEM-encoded form.